Mortar

made of terras, puzolana, tile-dust, or cinders, is mixed and prepared in the same manner as common mortar; only these ingredients are mixed with lime instead of sand in a due proportion, which is to be in equal quantities. As this mortar is to be used in aquatic buildings, the lime should be the very best. In fortifications, docks, or piers of harbors, lay all the works under water with terras-mortar, and the rest of the facings, both within and without, with cinder or tile-dust mortar, for about two feet deep. The East India Mortar for building and plaistering, is made with shell lime, brick dust pulverized, (called soorkee ) washed sand, and the raw juice of the sugar cane, (called jaggeree .) The proportions of different kinds of work are different; but well made and mixed, surpa es all others; the roofs of houses, as well as the floors of their chambers, and the walls are covered with this composition, which, skilfully executed, bears a polish and smoothne like marble.